Stairs

ABSTRACT

Stairs are described, comprising a lining made of tread plates ( 3 ) fastened in the tread area ( 2 ) of the steps ( 1 ) and riser plates ( 5 ) arranged in the riser area ( 4 ) which are held with a lower boundary section between the riser area ( 4 ) of the steps ( 1 ) and the respectively adjacent bottom tread plate ( 3 ) and are overlapped in the upper boundary region ( 14 ) by a downwardly projecting boundary nose ( 16 ) of the respective upper tread plate ( 3 ). In order to provide advantageous fastening conditions it is proposed that the riser plates ( 5 ) engage with their bottom boundary section into an upwardly open holder profile ( 6 ) which is U-shaped in its cross section and is fastened with the leg ( 8 ) on the step side in the riser area ( 4 ) of the steps ( 1 ) and overlaps the adjacent bottom tread plate ( 3 ) with a bent covering flange ( 10 ) of the other leg ( 9 ).

FIELD OF THE INVENTION

The invention relates to stairs with a lining made of tread platesfastened in the tread area of the steps and riser plates arranged in theriser area which are held with a lower boundary section between theriser area of the steps and the respectively adjacent bottom tread plateand are overlapped in the upper boundary region by a downwardlyprojecting boundary nose of the respective upper tread plate.

DESCRIPTION OF THE PRIOR ART

In order to line the steps of stairs it is known (EP 1 111 155 A2) toinsert tread and riser plates, with the riser plates being held with alower boundary section between the riser area of the step and theadjacent bottom tread plate and engage with their upper boundary area ina groove on the bottom side of a boundary nose projecting beyond thetread area of the step of the tread plates which are adjacent at thetop. The rounded upper boundary region of the riser plates allows aswiveling capability of the riser plates about the rounded upperboundary region as a pivoting axis with a flute provided adjacent tosaid rounded boundary region on the step side of the riser plates, sothat a simple adjustment of the riser plates to the course of the riserregion of the steps is enabled. Such a fixing of the riser plates in theupper boundary region requires tread plates however which have asufficient thickness for forming a receiving groove for the riserplates. A precise adjustment of the adjacent bottom tread plate willbecome necessary in the region of the bottom boundary section of theriser plates in order to ensure a connection with the smallest possiblejoint of the rear longitudinal edge of the tread plates pressing theriser plates against the riser area of the steps. This requires arespective versatility in craftsmanship in the machining of the treadplates.

SUMMARY OF THE INVENTION

The invention is thus based on the object of providing stairs of thekind mentioned above in such a way that a favorable fixing of the riserplates can be ensured without requiring a precise machining of the treadplates in the region of their rear longitudinal edge.

This object is achieved by the invention in such a way that the riserplates engage with their bottom boundary section into an upwardly openholder profile which is U-shaped in its cross section and is fastenedwith the leg on the step side in the riser area of the steps andoverlaps the adjacent bottom tread plate with a bent covering flange ofthe other leg.

Since a separate holder profile is provided for receiving the riserplates, which holder profile is fastened in the riser area of the steps,the fixing of the riser plates is independent of any precise adjustmentof the tread plates, so that the tread plates adjacent to the riserplates at the bottom can be cut with a wide tolerance in the region ofthe rear longitudinal edge. As a result of the bent covering flangewhich is formed by the holder profile which is U-shaped in its crosssection, simple tolerance compensation is offered becausetolerance-induced joints between the tread plate and the holder profileare bridged by the covering flange.

To ensure that the covering flange itself can be placed on theoverlapped tread plate in a jointless manner, the bent covering flangeof the holder profile can project downwardly against the overlappedtread plate. Especially advantageous constructional conditions areobtained in this connection when the bent covering flange of the holderprofile has a cross-sectional shape adjusted to a quarter circle and ispreferably joined with the adjacent leg of the holder profile by meansof a bending area, so that by bending the covering flange relative tothe holder profile the contact of the boundary section projectingagainst the tread plate can be ensured on the tread plate bycompensating any thickness tolerance. Said bending of the coveringflange about a bending axis extending in the area of the bending alsoallows adjusting the covering flange to different inclinations of thesteps in the riser area.

For the purpose of adjusting the holder profile to the respectiveinclination of the steps in the riser area, the transitional areasbetween the legs and the web connecting the legs of the holder profilewhich is U-shaped in its cross section can form bending points by meansof thin places for example, so that in the case of stronger inclinationsof the riser area the web of the holder profile can be adjusted to thecourse of the tread area.

An additional fixing of the riser plates in the upper boundary regionwill often become superfluous by using the holder profile in accordancewith the invention, so that the mere overlap by the downwardlyprojecting boundary nose of the upwardly adjacent tread plate issufficient for holding the riser plates. It is understood thatadditional fixing possibilities can be provided, preferably in such away that a downwardly open receiving profile for the upper boundaryregion of the riser plates is provided on the inside of the downwardlyprojecting boundary nose of the tread plates. Said receiving profileconnected with the boundary nose of the tread plates assumes the holdingtasks which are fulfilled otherwise by a groove on the bottom side ofthe tread plates with the advantage that any dependence on the thicknessof the tread plates is avoided. In order to achieve a favorableconnection of the receiving profile with the boundary nose of the treadplates, the receiving profile can form a fastening web which engages ina groove of the boundary nose of the tread plates and whichpredetermines the position of the receiving profile relative to theboundary nose of the tread plates.

BRIEF DESCRIPTION OF THE DRAWING

The subject matter of the invention is shown by way of example in thedrawings, wherein:

FIG. 1 shows sections of a stair in accordance with the invention in asimplified longitudinal sectional view, and

FIG. 2 shows a cross-sectional view of a holder profile for the riserplates which differs from that in FIG. 1.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The steps 1 of stairs are lined in the tread area 2 with tread plates 3and in the riser area 4 with riser plates 5. A holder profile 6 is usedfor fastening the riser plates 5, which profile has a U-shaped crosssection with two legs 8 and 9 which are joined by a web 7. While the leg8 on the step side is fastened in the riser area 4 of steps 1 such as ascrewed connection or glued joint, the other leg 9 carries a bentcovering flange 10 whose cross section is adjusted of a quarter circle.In accordance with FIG. 1, the bent covering flange 10 is connected bymeans of a connecting web 11 with the leg 9 of the holder profile 6,with a bending axis being obtained as a result of a thin point 12, aboutwhich the covering flange 10 can be bent for adjustment to theinclination conditions of steps 1 in the riser area 4 or for adjustmentto the thickness of the tread plates 3. Since the transitional areasbetween the legs 8, 9 and the web 7 of the holder profile 6 are alsoobtained by bending points 13 formed by thin places, the U-shapedsection of the holder profile 6 can be adjusted to the respectiveinclination of the riser steps.

For fixing the riser plates 5 in the upper boundary region 14 which areinserted into the holder profile 6, a receiving profile 15 is used whichis fastened to the inside of a downwardly projecting boundary nose 16 ofthe tread plates 3, in accordance with the embodiment by means of afastening web 17 engaging in the groove of a boundary nose 16. Saidreceiving profile 15 forms a pivot bearing for the rounded upperboundary section 14 of the riser plates 5, such that the riser plates 5can be pivoted according to the inclination of the steps 1 in the risersection 4. In order to ensure a sufficient pivoting angle, a flute 18 isadjacent to the rounded boundary section 14 on the inside of the riserplates 5.

For lining the steps 1, the holder profile 6 is fastened at first in theriser area 4 starting with the lowermost step before the riser plate 5is inserted into the U-shaped cross section of the holder profile 6. Theupwardly adjacent tread plate 3 is placed. When a receiving profile 15is provided, the riser plate 5 will engage in the receiving profile 15.The cover flange 10 of the holder profile 6 for the next step 1 isadjusted by respective bending if required to the tread plates 3 whichare glued together with the tread area of steps 1 and a riser plate 5 isinserted, whereupon the process is repeated step by step.

The holder profile 6 can be provided with different configurationsbecause it is merely necessary to receive the riser plates 5 in aU-shaped cross section and to cover the connecting joint to the bottomtread plate 3 by a covering flange. FIG. 2 shows an embodiment of theholder profile 6 which is simplified as compared with FIG. 1. The coverflange 10 which again has the cross-sectional shape of a quarter circleis not attached via a connecting web but directly to the leg 9 of theholder profile 6, which occurs via a thin place 12 so that theadjustability of the covering flange 10 is given about a bending axisextending in the direction of the longitudinal edge of leg 9. The coverflange 10 protrudes with its free boundary section against the bottomtread plate 3, thus facilitating the connection of the covering flange10 to the tread plate 3.

1. Stairs with a lining made of tread plates fastened in the tread areaof the steps and riser plates arranged in the riser area which are heldwith a lower boundary section between the riser area of the steps andthe respectively adjacent bottom tread plate and are overlapped in theupper boundary region by a downwardly projecting boundary nose of therespective upper tread plate, wherein the riser plates (5) engage withtheir bottom boundary section into an upwardly open holder profile (6)which is U-shaped in its cross section and is fastened with the leg (8)on the step side in the riser area (4) of the steps (1) overlaps theadjacent bottom tread plate (3) with a bent covering flange (10) of theother leg (9).
 2. Stairs according to claim 1, wherein the bent coveringflange (10) of the holder profile (6) can project downwardly against theoverlapped tread plate.
 3. Stairs according to claim 2, wherein the bentcovering flange (10) of the holder profile (6) has a cross-sectionalshape adjusted to a quarter circle.
 4. Stairs according to claim 1,wherein the covering flange (10) is joined with the adjacent leg (9) ofthe holder profile (6) by means of a bending area (12).
 5. Stairsaccording to claim 1, wherein the transitional areas between the legs(8, 9) and the web (7) connecting the legs (8, 9) of the holder profile(6) which is U-shaped in its cross section from bending points. 6.Stairs according to claim 1, wherein a downwardly open receiving profile(15) for the upper boundary region (14) of the riser plates (5) isprovided on the inside of the downwardly projecting boundary nose (16)of the tread plates (3).
 7. Stairs according to claim 6, wherein thereceiving profile (15) forms a fastening web (17) engaging in a grooveof the boundary nose (16) of the tread plates.